MEK1 (IMAGE) California Polytechnic State University Caption This is a model of the active human MEK1 bound to ATP. Credit Kimberly Sabsay Usage Restrictions The image may be used with appropriate caption and credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.